title: Evolution: sperm, cryptic choice, and the origin of species.
abstract: In two fruit fly species, in vivo observations of competing sperm reveal how differences in sperm size, female behavior and reproductive architecture promote retention of same-species sperm. Sexual selection continues after mating and may play an important role in speciation.
authors.affiliation: Department of Biology, Queen's University, Kingston K7L 3N6, Canada. Electronic address: adam.chippindale@queensu.ca.
authors.forename: Adam K
authors.initials: AK
authors.lastname: Chippindale
mesh_terms: D000818:Animals; D003307:Copulation; D004330:Drosophila / Q000033:anatomy & histology* / Q000235:genetics*; D005260:Female; D049810:Genetic Speciation; D008297:Male; D060047:Reproductive Isolation